We're looking to replace our existing RBD cluster, which makes and stores our backups. Atm we've got one machine running backuppc, where the RBD is mounted and 8 ceph nodes.
The idea is to gain in speed and/or pay less (or pay equally for moar speed). Doubting to get SSD in the mix. Have I understood correctly that it's useful for setting up a cache pool and / or for separating the journal? Can I use a different server for this? Old specs (8 machines): CPU: Intel Xeon D1520 4c/8t 2.2 GHz/2.6 GHz RAM: 32 GB DDR4 ECC 2133 MHz Disks: 5x 6 TB SAS2 Public network card: 1 x 1 Gbps 40 disks, total of 1159.92 euro Consideration for new specs: 3 machines: CPU: Intel Xeon E5-2620v3 - 6c/12t - 2.4GHz /3.2GHz RAM: 64GB DDR4 ECC 1866 MHz Disks: 12x 4 TB SAS2 Public network card: 1 x 1 Gbps 36 disks for a total of 990 euro 10 machines: CPU: Intel Xeon D-1521 - 4c/8t - 2,4GHz /2,7GHz RAM: 16GB DDR4 ECC 2133MHz Disks: 4x 6TB Public network card: 1 x 1 Gbps 40 disks for a total of 940 euro Perhaps in combination with SSD, this last option?! Any advice is greatly appreciated. How do you make your decisions / comparisons? 1 disk per OSD I guess, but then, how many cores per disk or stuff like that? Thanks in advance. Nino Bosteels
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